The title compound [Cu（C11H29N5）]（ClO4）2 was synthesized and characterized by elemental analysis, IR and X-ray single-crystal diffraction. The compound crystallizes in the monoclinic system, space group P21/n with...The title compound [Cu（C11H29N5）]（ClO4）2 was synthesized and characterized by elemental analysis, IR and X-ray single-crystal diffraction. The compound crystallizes in the monoclinic system, space group P21/n with α = 9.405（2）, b = 14.495（3）, c = 14.715（3） A, β= 90.262（3）°, V=2006.1（7） A^3,M,=493.83,Z=4,F）（000）= 1028,Dc= 1.635 g/cm^3, T= 298（2） K,μ= 1.403 mm^-1 and = 0.71073 A. The was refined to R = 0.0508 and wR = 0. 1250 for 2293 observed reflections with I 〉 2σ（I）. The Cu（Ⅱ） atom possesses a five-coordtinate CuN5 environment which shows a slightly distorted square-pyramidal geonetry. Antimicrobial activity study found that the complex is active against Salmonella species, Staphylococcus aureu, Bacillus pumilus and Bacillus coliforms.展开更多
The title complex [Cu（ampym）（bapa）Cl]（ClO4） （C10H22Cl2CuN6O4） was synthesized and characterized by elemental analysis, IR and X-ray single-crystal diffraction. The crystal crystallizes in the orthorhombic syst...The title complex [Cu（ampym）（bapa）Cl]（ClO4） （C10H22Cl2CuN6O4） was synthesized and characterized by elemental analysis, IR and X-ray single-crystal diffraction. The crystal crystallizes in the orthorhombic system, space group Pna21 with a = 11.9904（12）, b = 15.9796（16）, c = 8.9 i 43（9） A^°, V = 1708.0（3）A^°3 Mr = 424.78, Z = 4, F（000） = 876, Dc = 1.652 g/cm^3, T = 293 K,μ =1 .619 mm^-1 and λ=0.71073 A^°. The structure was refined to R = 0.0240 and wR ： 0.0564 for 2905 observed reflections with I 〉 2σ（I）. Flack = 0.039（12）.展开更多
As a coupling agent,(3-aminopropyl)triethoxysilane(APTES)was used to synthesize a series of silanized waterborne polyurethanes(Si-WPUs)through the acetone process.The Fourier transform infrared spectroscopy(FTIR)toget...As a coupling agent,(3-aminopropyl)triethoxysilane(APTES)was used to synthesize a series of silanized waterborne polyurethanes(Si-WPUs)through the acetone process.The Fourier transform infrared spectroscopy(FTIR)together with the X-ray photoelectron spectroscopy(XPS)was utilized to measure both elements and structures of these samples.The scanning electron microscope(SEM)results explained that APTES would be agglomerate on the surface of WPU films when the mass fraction of the agent concentration was more than 8%.Besides,the contact angle of water(CAW)can be improved from 56.5°to 90.0°by adjusting APTES concentration in Si-WPU.The decomposition temperature of films was also improved with the increase of APTES,and a significant increase could be seen in the glass temperature from 51.00℃to 85.74℃.展开更多
The cationic reagent 1-(3-aminopropyl)-3-butylimidazolium bromide(BAPI) was exploited for the derivatization of carboxyl groups on peptides.Nearly 100% derivatization efficiency was achieved with the synthetic peptide...The cationic reagent 1-(3-aminopropyl)-3-butylimidazolium bromide(BAPI) was exploited for the derivatization of carboxyl groups on peptides.Nearly 100% derivatization efficiency was achieved with the synthetic peptide RVYVHPI(RI-7).Furthermore,the peptide derivative was stable in a 0.1% TFA/water solution or a 0.1%(v/v) TFA/acetonitrile/water solution for at least one week.The effect of BAPI derivatization on the ionization of the peptide RI-7 was further investigated,and the detection sensitivity was improved >42-fold via matrix-assisted laser desorption/ionization time-of-flight mass spectrometry(MALDI-TOF MS),thus outperforming the commercial piperazine derivatization approach.Moreover,the charge states of the peptide were largely increased via BAPI derivatization by electrospray ionization(ESI) MS.The results indicate the potential merits of BAPI derivatization for high sensitivity peptide analysis by MS.展开更多
The conversion of perhydropolysilazane(PHPS)to silica at low temperature is beneficial for its application on thermally vulnerable substrates.In this work,it is demonstrated that(3-aminopropyl)triethoxysilane(APTES)ha...The conversion of perhydropolysilazane(PHPS)to silica at low temperature is beneficial for its application on thermally vulnerable substrates.In this work,it is demonstrated that(3-aminopropyl)triethoxysilane(APTES)has high catalytic efficiency for the low temperature conversion of PHPS and the catalytic mechanism of APTES was suggested.The influence of temperatu re and humidity on the catalytic conversion process was investigated,and it was found that PHPS can be rapidly converted to silica in 10 min at 80℃with relative humidity of 90%.The achieved silica is mainly composed of SiNO_(3)/SiO_(3)OH and SiO_(4)structure with O/Si of 1.74 and N content of 1%.As an approach to prepare inorganic coating,the low-temperature conversion method achieves a silica coating with low volume shrinkage of 0.86%,low roughness of R_(a)=0.293 nm,high nanoindentation hardness of 3.62 GPa and modulus of 30.06 GPa,which exhibits high potentials as protective coating for va rious materials even those vulnerable to high temperature.展开更多
基金The project was supported by the Natural Science Foundation of Jiangsu Province (No. BK2005045) and Key Marine Biotechnology Lab. of HHIT
文摘The title compound [Cu（C11H29N5）]（ClO4）2 was synthesized and characterized by elemental analysis, IR and X-ray single-crystal diffraction. The compound crystallizes in the monoclinic system, space group P21/n with α = 9.405（2）, b = 14.495（3）, c = 14.715（3） A, β= 90.262（3）°, V=2006.1（7） A^3,M,=493.83,Z=4,F）（000）= 1028,Dc= 1.635 g/cm^3, T= 298（2） K,μ= 1.403 mm^-1 and = 0.71073 A. The was refined to R = 0.0508 and wR = 0. 1250 for 2293 observed reflections with I 〉 2σ（I）. The Cu（Ⅱ） atom possesses a five-coordtinate CuN5 environment which shows a slightly distorted square-pyramidal geonetry. Antimicrobial activity study found that the complex is active against Salmonella species, Staphylococcus aureu, Bacillus pumilus and Bacillus coliforms.
基金This project was supported by the Foundation of Science Committee of Jiangsu province (BK2005045)
文摘The title complex [Cu（ampym）（bapa）Cl]（ClO4） （C10H22Cl2CuN6O4） was synthesized and characterized by elemental analysis, IR and X-ray single-crystal diffraction. The crystal crystallizes in the orthorhombic system, space group Pna21 with a = 11.9904（12）, b = 15.9796（16）, c = 8.9 i 43（9） A^°, V = 1708.0（3）A^°3 Mr = 424.78, Z = 4, F（000） = 876, Dc = 1.652 g/cm^3, T = 293 K,μ =1 .619 mm^-1 and λ=0.71073 A^°. The structure was refined to R = 0.0240 and wR ： 0.0564 for 2905 observed reflections with I 〉 2σ（I）. Flack = 0.039（12）.
基金Shanghai Undergraduate Training Program on Innovation and Entrepreneurship Grant,China(No.cs1904006)。
文摘As a coupling agent,(3-aminopropyl)triethoxysilane(APTES)was used to synthesize a series of silanized waterborne polyurethanes(Si-WPUs)through the acetone process.The Fourier transform infrared spectroscopy(FTIR)together with the X-ray photoelectron spectroscopy(XPS)was utilized to measure both elements and structures of these samples.The scanning electron microscope(SEM)results explained that APTES would be agglomerate on the surface of WPU films when the mass fraction of the agent concentration was more than 8%.Besides,the contact angle of water(CAW)can be improved from 56.5°to 90.0°by adjusting APTES concentration in Si-WPU.The decomposition temperature of films was also improved with the increase of APTES,and a significant increase could be seen in the glass temperature from 51.00℃to 85.74℃.
基金supported by National Basic Research Program of China (2012CB910604)National Natural Science Foundation of China (21205027,21005079,20935004)+1 种基金Analytical Method Innovation Program of Ministry of Science and Technology of China (2010IM030500)Natural Science Foundation of Hebei Province (B2012201095)
文摘The cationic reagent 1-(3-aminopropyl)-3-butylimidazolium bromide(BAPI) was exploited for the derivatization of carboxyl groups on peptides.Nearly 100% derivatization efficiency was achieved with the synthetic peptide RVYVHPI(RI-7).Furthermore,the peptide derivative was stable in a 0.1% TFA/water solution or a 0.1%(v/v) TFA/acetonitrile/water solution for at least one week.The effect of BAPI derivatization on the ionization of the peptide RI-7 was further investigated,and the detection sensitivity was improved >42-fold via matrix-assisted laser desorption/ionization time-of-flight mass spectrometry(MALDI-TOF MS),thus outperforming the commercial piperazine derivatization approach.Moreover,the charge states of the peptide were largely increased via BAPI derivatization by electrospray ionization(ESI) MS.The results indicate the potential merits of BAPI derivatization for high sensitivity peptide analysis by MS.
基金financially supported by the National Natural Science Foundation of China(No.21872152)Guangdong Natural Science Foundation(No.2019A1515111028)Xiejialin Foundation in the Institute of High Energy Physics(No.E15466U210)。
文摘The conversion of perhydropolysilazane(PHPS)to silica at low temperature is beneficial for its application on thermally vulnerable substrates.In this work,it is demonstrated that(3-aminopropyl)triethoxysilane(APTES)has high catalytic efficiency for the low temperature conversion of PHPS and the catalytic mechanism of APTES was suggested.The influence of temperatu re and humidity on the catalytic conversion process was investigated,and it was found that PHPS can be rapidly converted to silica in 10 min at 80℃with relative humidity of 90%.The achieved silica is mainly composed of SiNO_(3)/SiO_(3)OH and SiO_(4)structure with O/Si of 1.74 and N content of 1%.As an approach to prepare inorganic coating,the low-temperature conversion method achieves a silica coating with low volume shrinkage of 0.86%,low roughness of R_(a)=0.293 nm,high nanoindentation hardness of 3.62 GPa and modulus of 30.06 GPa,which exhibits high potentials as protective coating for va rious materials even those vulnerable to high temperature.
